Question

Помогите, пожалуйста
х+8/х-0.4=х+8/0.4х-4

Answer 1

x+8/х-2/5 = х+8/0,4х-4
х+8/5х-2/5 = х+8/0,4х-4
(х+8)*5/5х-2 = х+8/0,4х-4, х не = 2/5, х не = 10
(5(0,4х-4)-(5х-2))*(х+8)=0
(2х-20-5х+2)(х+8)=0
(-3х-18)(х+8)=0
-3(х+6)(х+8)=0
(х+6)(х+8)=0
х+6=0
х+8=0
х1,2 = -6; -8